EPEL repo installation in CentOS, RHEL Linux
Install the EPEL repository by downloading the appropriate RPM package using link for your system and installing it. Below repo allow in 64 bit server packages only.
CentOS Extras repository
If Extras repo Enabled in linux system.the run below command.The CentOS Extras repository includes a package to install EPEL, and is enabled by default. To install the EPEL package, run the below command:
#yum install epel-release
if above command not work then below sections provide manual installation instructions based on your distribution version of linux
CentOS and RHEL Linux 5.x
#wget http://dl.fedoraproject.org/pub/epel/5/x86_64/epel-release-5-4.noarch.rpm
#rpm -Uvh epel-release-5*.rpm
CentOS and RHEL Linux 6.x
#wget http://dl.fedoraproject.org/pub/epel/6/x86_64/epel-release-6-8.noarch.rpm
#rpm -Uvh epel-release-6*.rpm
CentOS and RHEL Linux 7.x
#wget http://dl.fedoraproject.org/pub/epel/7/x86_64/e/epel-release-7-5.noarch.rpm
#rpm -Uvh epel-release-7*.rpm